A rectangle channel discharge $1\mathrm{.}4\frac{L}{sec}$ of water through sluice gate as shown in the figure. The channel width is $9cm.$ The opening of the gate is

$Y_G=15mm,y_1=80mm,y_2=13mm.$

The discharge coefficient $C_d$ is

$($A$)0\mathrm{.}762$

$($B$)0\mathrm{.}828$

$($C$)0\mathrm{.}553$

$($D$)0\mathrm{.}608$

$($E$)0\mathrm{.}421$

The force $F_G$ acting on the gate is $(N)$

$($A$)7\mathrm{.}6$

$($B$)6\mathrm{.}2$

$($C$)3\mathrm{.}7$

$($D$)5\mathrm{.}8$

$($E$)4\mathrm{.}2$